Effect of Free Surface on the Stability of Individual Retained Austenite Grains in a Duplex Stainless Steel

Effect of Free Surface on the Stability of Individual Retained Austenite Grains in a Duplex Stainless Steel
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自由表面对双相不锈钢中单个残余奥氏体晶粒稳定性的影响

DOI:
10.1007/s11661-014-2435-6
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发表时间:
2014-07
影响因子:
2.8
通讯作者:
S. van der Zwaag
S. van der Zwaag
中科院分区:
材料科学2区
文献类型:
--
作者:
B.B. He;M.X. Huang;A.H.W. Ngan;S. van der Zwaag

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研究了双相不锈钢中自由表面对奥氏体晶粒稳定性的影响。研究发现,当引入自由表面时,残余奥氏体晶粒内会自动发生马氏体相变。这是由于马氏体形核能垒可以降低到热可克服的值,因为当基体约束被去除时,由马氏体相变引起的应变能大大降低。
The present work explored the effect of free surface on the stability of individual austenite grains in a duplex stainless steel. It was found that martensitic transformation took place automatically in the retained austenite grain when a free surface was introduced. This is due to the fact that the martensite nucleation energy barrier can be lowered to a thermally surmountable value as the strain energy induced by martensitic transformation is largely lowered when the matrix constraints were removed.
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